Motivation is one of the hardest things to control when sticking to a workout plan.

There are three things that will help in staying motivated:

-Positive reinforcement
-Self-control
-Social context

Sources say:

"Operant conditioning theory states that if a stimulus, such as exercise, elicits a positive response, such as enjoyment or contentment, then people will seek to reproduce those feelings by engaging in the behavior again.

Personal trainer James S. Fell says, "self-control is a limited resource and that the stress we experience during the day gradually erodes our willpower to exercise."

He also adds that by having a workout plan with a partner, such as a friend or family member, will also help in staying motivated. "For this reason," Fell says, "that working out by yourself can be a major barrier to sticking with an exercise routine."

As long as you can stick by those three rules, then hopefully you can stick to your workout plan.